Firefox had tab grouping first.Before Chrome. And then it broke support for it when they did the add-ons overhaul. I'm surprised bringing it back wasn't a high priority...
No, I expect Mozilla to know their market and use other means (like focus groups or surveys or something) to figure out which features are actually popular, instead of lazily using a bad metric.
Did you miss the part of the conversation where folks were pointing out that lots of users turn the telemetry off?
Your reply is as tone-deaf and non-responsive as sticking your fingers in your ears and yelling "nuh uh!" like a toddler.
If you want to be persuasive you've got to prove that the telemetry is somehow useful in spite of many users turning it off, and you've done absolutely fuck-all to argue that.
You are committing the same mistake as you accuse me of:
many users turning it off
[citation needed] [how many?]
For all you know, maybe the 15 very vocal users in here are the only ones who turn it off. Or do we know that many users do it? How many? 5%? 50%? 95%?
Watching people use Chrome, fucking nobody uses it there either, except for work situations where on FF, you're supposed to be using Multi-Account containers anyways.